Interview with a candidate. He calls himself "C++ expert" on his resume. I think: "oh, great, I love C++ too, we will have an interesting conversation!"

Me: let's start with an easy one, what is 'nullptr'?
Him: (...some undecipherable sequence of words that didn't make any sense...)

In my mind: mh, probably I didn't understand right. Let's try again with something simple and more generic

Me: can you tell me about memory management in C++?
Him: you create objects on the stack with the 'new' keyword and they get automatically released when no other object references them

In my mind: wtf is this guy talking about? Is he confusing C++ with Java? Does he really know C++? Let's make him write some code, just to be sure

Me: can you write a program that prints numbers from 1 to 10?

Ten minutes and twenty mistakes later...

Me: okay, so what is this <int> here in angle brackets? What is a template?
Him: no idea

Me: you wrote 'cout', why sometimes do I see 'std::cout' instead? What is 'std'?
Answer: no idea, never heard of 'std'

I think: on his resume he also said he is a Java expert. Let's see if he knows the difference between the two. He *must* have noticed that one is byte-compiled and the other one is compiled to native code! Otherwise, how does he run his code? He must answer this question correctly:

Me: what is the difference between Java and C++? One has a Virtual Machine, what about the other?
Him: Java has the Java Virtual Machine
Me: yes, and C++?
Him: I guess C++ has a virtual machine too. The C++ Virtual Machine

Me (exhausted): okay, I don't have any other questions, we will let you know

And this is the story of how I got scared of interviews

Friend : Hey bro I made an awesome program which shows your future wife's name.

Me : Hey that sounds interesting, show me the source code bro !!

Friend shows the code :

#include <bits/stdc++.h>
using namespace std;

int main()
{
string first_name , last_name;

cout << "Enter your first name\n";
cin >> first_name ;

cout << "Enter your last name\n";
cin >> last_name ;

cout << "Your wife's name is " << "Mrs " << last_name << "\n";

}

Me : Dude you are gonna crack Google some day :P

Job interview for junior dev position:

Recruiter: Implement stack
Me: Here you go *typical C++ stack implementation, struct node, push, pop*
Recruiter: This is classical over engineering, you should just inherit from std::stack
Me: wtf?

HE:"Hey I improved my code"

ME:
*opens the file*
*Sees random static allocations*
*Code is as verbose as before*
*Down to 2600 lines from 2800ish*
*Still doesn't do shit properly*

"Uuuh what exactly did you do?"

*Starts noticing the lack of namespaces*

HE: "I used this using namespace std to write a bit less"

ME: "Can I pay you yoga lessons so you can taste your own cock and show your parents how good you are at it?"

Fun fact:
11% of Americans think that HTML is a kind of STD

#include <iostream>

int main(){
std::cout<<"hello there i'm new here\n";
return 0;
}

Hi, my name is Juan, I'm 17 years old. I started programming when I was 12 years old (I started with Visual Basic 6) and I'm from Venezuela. A friend, named Javier, recommended DevRant, and I think it's a fantastic idea. I'm an inveterate lover of UNIX and all its variants, and of course, also of C/C++. I have so many projects in mind for the gamedev, but emptiness eats me and I can't develop them, it's pathetic.

#include <iostream>

int main() {
std::cout << "Hello, devRant\n";
return 0;
}

So I have a teacher that when he use "C++" it is basically C with a .cpp file-extension and -O0 compiler flag.

Last assignment was to implement some arbitrary lengthy calculation with a tight requirement of max 1 second runtime, to force us to basically handroll C code without using std and any form of abstraction. But because the language didn’t freeze in time 1998, there is a little keyword named "constexpr" that folded all my classes, arrays, iterators, virtual methods, std::algorithms etc, into a single return statement. Thus making my code the fastest submitted.

Lesson of the story, use the language to the fullest and always turn on the damn optimizer

Ok now I’m done 😚

So... I learnt a couple things today about C++ language which I didn’t know before...

1. float var = 5.9;
std::cout << ( var == 5.9 );

// shows 0 (false) coz of float and double thing... apparently, 5.9 isn’t automatically converted to float when compared to one 🤔

2. arr[ i ] == i[ arr ]

Well... I guess I now like my college 1% more from the previous % whatever that was 😊☺️

"Can't have a fucking std (method) call, give me a break"

Said that loudly on a phone call. Wondering why people were give me dirty looks on the train

Magento is a special kind of tool.
- >20GiB of files? ✔
- >1 GB database? ✔
- Memory needed for scripts >768 MB? ✔
- Script max. exec. time 5 hours? ✔
- Slow ass website? FUCKING ✔
- Slower deployment than a vote on a country wide legislation? FUCKING ✔
- Shitty crap pile of STD-ridden code? I BET YOUR STINKING ✔

Magento, sincerely, please die in agony.

#include<iostream>

int main()
{
std::cout<<"Hello Everyone. I'm New Here";
return 0;
}

Which distro did you get?

using namespace std;

u/bob
"hey can someone help me assign 10 to a variable in rust"

u/1337rustpro
"Well first of all little shithead that is not rust-like we dont do that in rust here is how godfather mozilla intended it first you create a register in your ram then you download these 9 packages that are not in std for some reason then you box your integer 78 times then you sacrifice a goat that the rust compiler doesnt give you random advice that doesnt work then you pee on your motherboard and commit 53 times to open source repos on github bitbucket and svn then you will maybe probably have 7 assigned to your variable"

u/bob
"Oh wow rust sure is overly complicated"

u/bob
<User banned>

I’ve begun to notice a distinct pattern with devs. I realise it has probably always been there but Im just thinking out loud as Ive started to actively notice it.

*Dev has literally one problem with a library/framework/environment*

“Holy crap <NAME> is the worst thing ever!! its actually worse than an STD. whoever made it needs to quit making software and become a goat farmer” (paraphrasing of course)

What is it with us that the second we have difficulty with a library or framework we immediately brand it as a cancerous polyp on the anus of humanity?

Dynamically typed languages are barbaric to me.

It's pretty much universally understood that programmers program with types in mind (if you have a method that takes a name, it's a string. You don't want a name that's an integer).

Even it you don't like the verbosity of type annotations, that's fine. It adds maybe seconds of time to type, which is neglible in my opinion, but it's a discussion to be had.

If that's the case, use Crystal. It's statically typed, and no type annotations are required (it looks nearly identical to Ruby).

So many errors are fixed by static typing and compilers. I know a person who migrated most of the Python std library to Haskell and found typing errors in it. *In their standard library*. If the developers of Python can't be trusted to avoid simple typing errors with all their unit tests, how can anyone?

Plus, even if unit testing universally guarded against typing errors, why would you prefer that? It takes far less time to add a type annotation (and even less time to write nothing in Crystal), and you get the benefit of knowing types at compile time.

I've had some super weird type experiences in Ruby. You can mock out the return of the type check to be what you want. I've been unit testing in Ruby before, tried mocking a method on a type, didn't work as I expected. Checked the type, it lines up.

Turns out, nested away in some obscure place was a factory that was generating types and masking them as different types because we figured "since it responds to all the same methods, it's practically the same type right?", but not in the unit test. Took 45 minutes on my time when it could've taken ~0 seconds in a statically typed language.

This meeting is not real. There is no spoon

Hoozay! I'm now starting to become an adult! (or atleast, that's what they expect of me)

myAge:
.long 19
main:
push rbp
mov rbp, rsp
mov eax, DWORD PTR myAge[rip]
add eax, 1
mov DWORD PTR myAge[rip], eax
mov eax, DWORD PTR myAge[rip]
mov esi, eax
mov edi, OFFSET FLAT:_ZSt4cout
call std::basic_ostream<char, std::char_traits<char> >::operator<<(int)
mov eax, 0
pop rbp
ret
__static_initialization_and_destruction_0(int, int):
push rbp
mov rbp, rsp
sub rsp, 16
mov DWORD PTR [rbp-4], edi
mov DWORD PTR [rbp-8], esi
cmp DWORD PTR [rbp-4], 1
jne .L5
cmp DWORD PTR [rbp-8], 65535
jne .L5
mov edi, OFFSET FLAT:_ZStL8__ioinit
call std::ios_base::Init::Init() [complete object constructor]
mov edx, OFFSET FLAT:__dso_handle
mov esi, OFFSET FLAT:_ZStL8__ioinit
mov edi, OFFSET FLAT:_ZNSt8ios_base4InitD1Ev
call __cxa_atexit
.L5:
nop
leave
ret
_GLOBAL__sub_I_myAge:
push rbp
mov rbp, rsp
mov esi, 65535
mov edi, 1
call __static_initialization_and_destruction_0(int, int)
pop rbp
ret

Yeah yeah, good ol' DropBox.
Which fucking piss-wanker has made the decision to NOT SUPPORT encrypted ext4 starting in november???
You think I'm going to reformat my SSD just for you, you little stinky cunt, huh?
CrapBox has hearned itself a place in /dev/null
Go fuck yourself, you hobo-raped STD host!

Finished the hacktober fest yesterday.. fastest 5 PRs I've ever made on my repos, I actually forgot to sign up at the beginning of the month.. I pity those who are following me.

#include <iostream>
using namespace std

int main();
{
cout << "Hello devRant!"
}

- Let's write some code to check for memory leaks
- Oh shit, memory is leaking like crazy
- In fact the program crashes within 10 minutes
*Some hours of debugging and not finding the cause later*
- Starts thinking about the worse
- Hell yeah, the memory leak is caused by the code that checks for memory leaks. But fucking how
- Finds out the leak is caused by the implementation of the std C lib
- In the fucking printf() function
- Proceeds to cry

My Unreal project right now:
FVector
std::vector
Eigen::Vector
KDL::Vector
....
*sigh*
And people ask me why I like Lisp. A Vector is a Vector goddamit! Half my project is now just parsing the same variable to the different functions. sigh....I hate this.

I fucking hate chained methods. Ok, not all of them. Query things like array.where.first... that stuff is ok.

Specially if it's part of the std lib of a lang, which would be probably written by a very competent coder and under scrutiny.
But if you're not that person, chances are you'll produce VASTLY inferior code.

I'm talking about things like:
expect(n).to.be(x).and.not(y)

And the reason I don't like it is because it's all fine and dandy at first.

But once you get to the corner cases, jesus christ, prepare to read some docpages.

You end up reading their entire fucking docs (which are suboptimal sometimes) trying to figure if this fucking dsl can do what you need.

Then you give up and ask in a github issue. And the dev first condescends you and then tells you that the beautiful eden of code he created doesn't let you do what you want.

The corner cases usually involve nesting or some very specific condition, albeit reasonable.

This kind of design is usually present in testing or validation js libraries. And I hate all of those for it.

If you want a modern js testing lib that doesn't suck ass, check avajs. It's as simple as testing should be.

No magic globals, no chaining, zero config. Fuck globals forced by libs.

But my favorite thing about it that is I can put a breakpoint wherever the fuck I want and the debugger stops right fucking there.

Code is basically lines of statements, that's it, and by overusing chaining, by encouraging the grouping of dozens of statements into one, you are preventing me from controlling these statements on MY code.

As an end dev, I only expect complexity increases to come from the problems themselves rather than from needlessly "beautified" apis.

When people create their own shitty dsl, an image comes to my mind of an incoherent rambling man that likes poetry a lot and creates his own martial art, which looks pretty but will get your ass kicked against the most basic styles of fighting.

I fucking hate esoteric code.

Even if I had to execute a list of functions, I'd rather send them in an array instead of being able to chain them because:
a) tree shaking would spare from all the functions i didn't import
b) that's what fucking arrays are for, to contain several things.

This bad style of coding is a result of how low the barrier to code in higher level langs are.

As a language or library gets easier to use you might think that's a positive thing. But at the same time it breeds laziness.

Js has such a low learning curve that it attacts the wrong kind of devs, the lazy, the uninspired, the medium.com reader, the "i just care about my paycheck" ones.

Someone might think that by bashing bad js devs I'm trying to elevate myself.

That'd be extremely stupid. That's like beating a retarded blind man in a game and then saying "look, I'm way better than this retarded blind man".

I'm not on a risky point of view, just take a stroll down npmjs.com. That place is a landfill. Not really npm's fault, in fact their search algorithm is good.

It's just the community.

Every lang has a ratio of competence. Of competent to incompetent devs.

You have the lang devs and most intelligent lib devs at the top. At the bottom you have the bottom.

Well js has a horrible ratio. I wouldn't be shocked to find out that most js devs still consider using import or await the future.

You could say that js improved a lot, that it was way worse beforr. But I hate chaining now, and i hated back then!

On top of this, you have these blog web companies, sucking the "js tutorial" business tit dry, pumping out the most obscenely unprofessional and bar lowering tutorials you can imagine, further capping the average intelligence of most js devs.

And abusing SEO while they're at it, littering the entire web with copy paste content.

When you see what worked for someone else with a similar issue on GitHub and run it.

Trust me, I hope I know what I'm doing too.

std::get_money :)

How can a candidate have 10+ years or experience with C++ and let alone struggle with the most simple exercise!?

Thoughts from the inner me during an actual interview:

FOR FUCK SAKE, DUDE, PUT THAT "std::" IN FRONT OF YOUR "vector" AND IT WILL COMPILE!

USE ITERATORS GODDAMMIT INSTEAD OF THOSE FUCKING INDEXES. YOUR CODE IS FULL OF DAMN OVERFLOW ERRORS!

HAVE YOU EVER REALIZED THAT ARRAYS CAN BE EMPTY SOMETIMES?

What's wrong with this code?

std::pair<float, float> foo() { return { 0, 0 }; }

"Nothing," would you say.

That's because you're normal.

But the most stupid C++ compiler ever (M$ VS)
issues an ERROR that converting 0 to float incurs possible "loss of data". So you have to write "0.f".

BTW, "0." is a double, so you really have to write "0.f". Or "static_cast<float>(0)" if you like ugly, impossible-to-read code.

A programmer walks into a bar. He has a concussion because you were using namespace std and didn't scope to building.

I am currently in a bit of a (well-deserved) lull at work, both of my projects are finishing up/ finished, so tomorrow should be pretty light, as the latter half of today was.

And I have really gotten interested in the HTTP protocol. It's so interesting learning how it all works under the hood.

So I think I'm going to be researching/ messing around with creating a cpp project that essentially implements cURL from the ground up, creating sockets, reading from them, parsing the HTTP requests... all that. I don't expect to actually get it done, but it should be an immense learning experience. I have a clear goal: implement this function:

std::string get(const std::string&);

Once I'm able to just GET as simple as that, I know I have achieved my goal!

Several minutes waiting for site to work after clicking on "required cookies only". Is this really what privacy laws were aiming for?

I started my internship at the end of the year..
Fuck my ass!!! This code I have to work with is a huge pile of shit.
The code base I need to work with is around 40k LOC. It is a mixture of C++, C, Java, Python, Bash and I think I saw some lonely js files around.

A list of awesome parts:
- Paths are hard coded.
- Redundant code everywhere
- No documentation or inline comments available

Most of the comments in the code are just old code that is not used anymore. But the cherry on the turd is the class that should provide all kind of useful functions in my daily routine. About ninety percent of the functions have the same description or nothing. Sometimes a function name says "readSomethingFromSomewhere" but instead it writes something to a file. It is really confusing and I need to check everything twice instead of rely on what the function name promises.
I have also learned why copy paste isn't that good. The brief descriptions of every method in a files are always the same.

getName() - Description: Fork child process
getIp() - Description: Fork child process
getIpv6() - Description: Fork child process.

Surprise: None of these functions forks a child process. :D

Another awesome feature is the thing that they store up to five different versions of libraries. Everyone with slight modifications but no hint which one you need to use. Sometimes it is the newest, sometimes the oldest which is running in production. Another case of try and error.
Oh and my dev machine is a potato with a power supply and a fan. I started with NetBeans and every time I compiled the code it sounds like the machine wants to lift off and leave for a better place. (At this point I switched to Emacs and everything runs smoothly now)

At first I thought that I'm just not that good at coding and understanding a big project from scratch but some colleagues have the same problem. The whole system is very inflexible and it is all about "std::cout"-debugging to check if your changes do what you want them to do.

Currently I'm just trying to fix this mess to make the life for the next student or employee easier. The first month was just frustrating as hell. I need to ask so many questions and most of the time the answer was "I don't know, haven't touched this code in years". Needless to say that my progress isn't that awesome but at least I get a nice payment for 20 hours of work a week.

We all know you can't "learn x programming language in a day" without travelling to the Arctic and catching a day that last half a year.

But what's the worst language to try and learn in a day?

I vote c++. Manual memory management, multiple inheritance, static compilation, operator overloading, and generally non-human syntax ( Like std::cout << "This is how you print!" << std::endl; ) make it a difficult one to attempt in a day.

The Cloud Of Bullshit

Every day I wake, and I think of my one true mission in life. To mock and ridicule paint huffing idiots. Something recently that drew my ire, like the hemorrhoids on my ass is this idea of 'the cloud', THE CLOUD and the buzzword lingo-bingo bullshit that providers use to hype and sell it.

For example, airtable is an amazing service. I love that I can insert just about anything into a row, create any of my own row datatypes, that it's flexible as all hell.

I love it.

And I hate that I'm essentially locked in to the cloud.
I fucking hate how if my internet goes down (thanks you pie eating inbred dipshits at comcast) I have no access.
If the company is bought, they'll shut down like all the rest , to be "relaunched at a later time" (or never).
I hate that if the company doesn't make enough money, or it's investors change their mind, woopsie, service is shut down.
I hate that the cloud is synonymous with massive data leaks and IOT-levels of stupidity in security practices.

Every time someone says "but its in the cloud! Isn't it amazing!"

I always think 1. YEAH IF IM AN INVESTOR I GET TO MILK LOW BROW FINGER PAINTING FUCKWITS EVERY MONTH like Adobe sucking the blood from infants who are still in college.

2. Why? So I can get locked into their platform, have them segment off previously free features (fucking youtube and the 'subscribe so you can continue playing audio with your screen off' bullshit), and then have fees increase month over month?

3. Why, so every four years during the presidential selection, if I piss off some fuckstick braindead lemming literally sucking his girlfriends BFs cock, they can potentially shut me out from my own data completely?

The Cloud is built on shit-colored hype sold to knob gobbling idiots, controlling idiots, profiting at the expense of idiots, and later fucking them for buyout payola. The Cloud is a Cloud of Bullshit shat out by huckster messiahs straight into the lapping mouths of fanatics worshiping slavishly like toilet drinking scum at the porcelain alter of a neon god, invisible, untouchable, and like a spigot, easily shut off without anyone noticing. And when it happens, I'll be there, shouting "WHERE IS YOUR CLOUD NOW?"

Native any day. 100% native or I don't fucking want it
None of this node.js-gone-native bullshit either with notetaking apps taking up hundreds of megabytes of ram, where everything is bootstrap or react, in a browser, in a window container, because people are so fucking incompetent we have to hold their hand WHILE they give themselves a reach around.

Native or nothing.

For my favorite notetaking app, I use Microsoft OneNote. "OH god, a heathen, quick, stick his body up on a stake!"

But hear me out. I'll be the first one in a crowd to kick bill gates in the nuts (not because I particularly hate microsoft, just because I think hes kind of a cunt).

So when I say onenote is good, I really fucking mean it. Sure they did some cunty things like 'dumbed down' the interface, and cut out some options. But you know what they can't do?
Shut down the damn service (short of a system update completely removing the whole app, which, frankly, wouldn't surprise me).

It's so god damn good it waxed my balls, cured my cancer, fixed my relationship with my father, found my long lost brother, and replaced ALL my irl notebooks.

It's so good that if it was cocaine I'd be hospitalized for overusing it.

So god damn good it didn't just replace all my notebooks, it even replaced and sped up my mockup process three to five times. Want layers?

Built in. Just drag an image on to the notebook to import instantly.

Want to rearrange layers? Right click select "send forward/back/bring to front/send to back".

Everything snaps to grid by default and is easily resizeable.

I had all the elements for a UI sliced and diced. Wanted to try a bunch of layouts. Was gonna take me two damn days.

Did it in three hours with the notebook features of onenote.

After I started using onenote, me and my bodypillow finally conceived even.

Sweet marries mammaries I just fucking jizzed. Thank you onenote.

P.s. It really did speed up my UI design, allows annotated images, highlighted text. Shit, it can even do kanban.

And all I can think is "good job microsoft making an awesome product for free, being dumb as fuck for not charging for it, and then not marketing it at ALL."

It was sheer fucking luck that I discovered it while was I was looking for vendor STD bloatware to blast off my new install.

OneNote: Worth a try even for the kick-gates-in-the-nuts fan club.

The cloud can suck my balls.

If god was a programmer, do you think he made us like

int sex = rand()% 2+1;

if (sex == 1){
std::cout << “it’s a girl!”;
}

else if (sex == 2){
std::cout << “its a boy!”;
}

Well not bad for my first try eh? I implemented a std::vector-like container and it's about 4 times as fast as std::vector

Here is another rather big example of how C++ is WAY slower than assembler (picture)

Sure - std::copy is convenient
but asm is just way faster.
This code should be compatible with EVERY x86_64 CPU.

I even do duffs device without having the loop:
the loop happens in the rep opcode which allows for prefetching (meaning that it doesnt destroy the prefetch queue and can even allow for preprocessing).

BTW: for those who commented on my comment porn last time: I made sure to satisfy your cravings ;-)

To those who can't make sense of my command line:

C++ 1m24s
ASM 19s

To those who tell me to call clang with -o<something>:
1) clang removes the call to copy on o3 or o2
2) the result isnt better in o1 (well... one second but that might be due to so many other things, and even if... one second isn't that much)

Now I'm concerned that using std as a namespace can be seen as offensive by people who are carrying an STI.

Public test of an assignment I had to do

I have not researched it so I'm not sure if this is a widely known thing but I figured out a sort of hacky way to get a max integer value:

-Declare an unsigned int.
-Subtract 1
-Divide 2

That is your max signed int value

int main(){
unsigned int a = 0;
a--;
std::cout << a / 2 << std::endl;
}

std::cout<< " University, here I come! ";

// just passed a very important exam and I can't wait to get enrolled at my dream Uni :) Fingers crossed 🤞🏻

A 'using namespace std;' in a FRIGGGINGG FRIGG LIBRARY HEADER.
"Yuh, I'm totally the king of multiverse. F*** me, right"

Interviewing a 7yr experienced c++ guy, started with an ice breaker.
Me: when would you use std::list and when would you prefer to use std::vector
Candidate: vector for sequential elements and list for sequential but sorted elements
Me: why list for sorted elements? I didn’t say anything about sorting
Candidate: you’re rude

Real telephonic interview

My last company had a code base originating in the 90's and they still write most parts of the GUI with a library that is a thin layer on top of Win32 API, with a self-rolled "ORM" for DB access (with LOTS of enums) and all that with >2million lines of C++ code. The code includes at least two implementations of std vector and std:list. One of which is even *named* std::vector. Feels good remembering that I have left that behind

got a SSD. I'm lovin it.

I can not fuckin stress how goddamn annoying it is to work with strings in C++. I'm not talking about std::string, those are bearable. But fucking char foo[number], char* foo, and const char* foo. AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

Do you guys find yourself ignoring things you should be using just because you're too stubborn to learn how they work? Because I just used std::shared_ptr for the first time today.

!rant
Will this code be compiled ?

#include<iostream>
using namespace std;
int main(){
int 🥩=1;
int 🧀=1;
int 🥬=1;
int 🍞=1;
int 🍅=1;
int 🥪=🍞+🥬+🍅+🧀+🥩;
cout<<🥪;

return 0;
}

Writing simple terminal input/output lang (Hello, what's your name, hi) in D.
Compiling in D using standard lib: 6.1M
Compiling in D with inline assembly, no standard lib or libc, using syscalls: 1048 bytes!
I'm still freaking out a little.

class XXX
{
public:
std::vector<std::wstring> m_Files; // Recently used files

why not just use:

class XXX
{
public:
std::vector<std::wstring> m_RecentlyUsedFiles;

FFS

Fuck c++
Everytime I have to use this fucking language it spits up some other bullshit error

`cannot convert std::vector<int>() to std::vector<int>&`

WHY THE FUCK ARE STACK ALLOCATED VALUES EVEN THEIR OWN TYPES

AND WHY CANT I TAKE A GOD DAMN REFERENCE TO IT

JUST WHYYYYY

Rust-std? Fuck! That's what I get for cheating on JavaScript...

So today I told my boss “nodejs without typescript is like sex with strangers without a condom. Sure it’s fun and all... but then you get an std”

#include <iostream>

using namespace std;

int main() {
cout << "Hello world" << endl;
}

If it works, It's time for a coffee break!! :)

Fuck. I just want to fucking use OpenCV on CLion on Windows. Why the fuck do I need twenty fucking PhD's in quantum rocket science to set up a simple project with Cmake?

During the time I just wasted trying to get the correct library to link properly, I could have rewritten all of Tesla's fucking CV functionality from scratch, but instead here I am spending literal fucking hours googling why the fuck does 'recursive_mutex' not name a fucking type in namespace 'std' on mingw.

Fuck C++ I'm going back to C# where I can literally install OpenCV and all of its fucking dependencies from nuget with ***ONE*** fucking click.

Found this gem while searching for some poll data about the apocalypse

If you're working on close to hardware things, make sure you run static analysis, and manually inspect the output of your compiler if you feel something's off - it may be doing something totally different from what you expect, because of optimization and what not. Also, optimizations don't always trigger as expected. Also, sometimes abstractions can cost a fair amount too (C++ std::string c/dtor, for example, dtors in general), more than you'd expect, and in those cases you might want to re-examine your need for them.

Having said all that, also know how to get the compiler to work for you, hand-optimization at the assembly level isn't usually ideal. I've often been surprised by just how well compilers figure out ways to speed up / compactify code, especially when given hints, and it's way better than having a blob of assembly that's totally unmaintainable.

Learnt this from programming MCUs and stuff for hobby/college team/venture, and from messing around with the Haskell compiler and LLVM optimization passes.

Rust ahahaah hhaahah ahah

the trait bound `std::result::Result<std::string::String, std::io::Error>: std::convert::AsRef<[u8]>` is not satisfied
the trait `std::convert::AsRef<[u8]>` is not implemented for `std::result::Result<std::string::String, std::io::Error>`

Imagine world all software utilities were as good as the std unix system utilities...

I get the feeling that people who prefer C and dislike C++ just don't like stds.

Things I do when I'm coding in C
Laugh like a stupid 10 year old at STD in stdio.h (Sexually Transmitted Diseased input output)
Keep trying to type studio.h instead of stdio.h

hmmmmmm let me see.

Web based? lets do web based.

Do something simple like a basic crud app on web api format:
Do it with full authorization and authentication.
Start hard. Do it with pure golang using NOTHING but the std libraries.
Now, do it in a magic mvc framework like Rails or Laravel
Now do it on dotnet core
Now do it in django rest.

Watch the differences in all of them, sell your soul to something and now do it in Clojure. If you do it on a Scheme dialect or on Common Lisp my CMS admin will suck your whatever you have. Dude seems to be pretty good at it, we are trying to keep him from pulling tricks on the street but he insists.

Then add a React client with Typescript to get them basic ass endpoints to display nicely.

It should give you a fuckload of perspective amongst the different tools and way we do things and might make you appreciate the differences in paradigms required(pro points for doing modular in c# dotnetcore using different classlibs for the major points of the application using some crazy pattern like the mediator pattern)

I would hire a mfker that throws all this shit at me on a portfolio on the spot.

Recently bought an Adafruit Industries board which controls stepper motors over i2c. It has a Phython library, but my code is in C++. Decided to convert the Python code to C++ to get started quickly. Behold the magic line that made everything work:

std::this_thread::sleep_for(std::chrono::milliseconds(10));

I can't believe Python's ridiculous performance is being harnessed to let the field generated by electromagnets in a stepper motor to grow to sufficient proportions to affect movement. Without the said sleep(), the stepper motor just vibrates with my C++ code. Not sure if the library was created with Python's performance in mind, or they simply didn't think about back EMF in electromagnets...

Rant C++
Why do some people like to use ALL the language features. lets use "auto" en "std::tuple" and "std::tie" to hook everything together.. I cannot put something In a list because I now have to use std::move. SURE! If for every line of code I need to lookup what things were again or fixing compile errors it breaks my flow. "std::bind" this and Template that. half of the stuff you don't actually need.. it just complicates things..

Not all are bad. Only Unnecessary sometimes.

I wanted to update my previous rant in the comment but what happened is such a fucking nonsense I think it deserves its own.

For those who don't want to look what it is, just another C++ noob (aka me) complaining about how the language was a bitch to him by throwing a random SEGFAULT on release while it didn't show up on debug. Welp.

Half an hour and a ton of std::cout later (thought I would try to read a disassembly ? Think again) I figured out what was the problematic section of code. And guess what ? It was a section I didn't even modify and I never had problems with. Something completely unrelated to what I was rightly imagining causing the issue.

To identify which exact subsection was throwing the error to my face I added more tag code.
Rubbing my hands and ready to fix the fuck out of this damn shit, I built it, launched it…

And all of a sudden the code worked.

All I did. Was to add more cout to know which line fucked up. And now it works.

So. Serious question now: is it a clear sign from heaven I should stop working with such languages and should go back in my shitty high level languages kindergarten ?

I feel irritated when a c++ tutorial doesn't use namespace std at the top of the file.

Hey this is my first post on This new fitness-tracker-app community

I will tell y'all my workout :)

-programming a parser

FUCKING HELL PLEASE STOP ALREADY THIS IS THE WORST SHIT IVE EVER DONE EVERY WHERE IF STATEMENTS JUST TO CONSUME FOUR FUCKING TOKENS I DONT WANT TO DIE BUT I'D LIKE THIS PROJECT TO BE FINISHED ALREADY BECAUSE THIS IS ANNOYING AS FUCK I REALLY WANT TO KICK MY COMPUTER WHILE TELLING IT TO BE THE MOST STUPID BRAIN ON THE WORD AND THEN REMEMBERING THAT ITS NOT A BRAIN FUCK MY FUCKING FUCK HELL THEN I WOULD KILL THE PEOPLE WHO THOUGHT THAT MAKEING std::vector::end() RETURN AN ITERATOR WITHOUT ELEMENT WAS FINE AND THEN I'D KILL ALL THOSE WHO COME INTO MY ROOM THUS DISTURBING MY WORKFLOW

Enough rage.

Any other language: Hey fuckface, you can't name this variable by a single letter, tf is wrong with you? use some descriptive shit.

Golang: lmao fuck u

I really find it interesting how we use short variable names for items in golang. Kinda makes sense when you think of it. Most of these items come up in short methods for which the mental model lets you know and remember what you are doing, they even make sense when going through the std lib in which that shit is all over the place. YET years of going by other languages has made me squint my eyes a bit in frustration every time I see it.
Say for example that a function is implementing io.Writer. What would you call the method parameter? you could argue that writer would be sensible since it has it in the signature, but what about when the io.Writer in itself is a file or a socket or whatever? writer would be funny or strange? nah fuck it just w, it makes sense, but x wouldn't. I find these points to make sense even if i don't like them.

Would, now, this practice be acceptable in C? you are supposed to write the same modular code with C in which you compose large functionality in separated units of code, yet I am sure this practice of single name variables is something that C engineers dislike greatly.

Are go devs just doing this out of blind love for their preference in languages? and how would this work if mfkers add generics to go(I hope not, Go is simple enough to understand in order to extend functionality through the empty interface, but that is a preference of mine as well)

The more I use Go the more I like it to be honest, I think the code looks ugly syntactically, but that is subjective as all hell and based on my constant preference for a language to look like Ruby, which even though it might not be everyone's cup of tea it remains to my eyes as the most beautiful language in existence, again, an obvious personal preference.

C:
char greeting[] = "Hello world";

Developers: char array... What da f*CK!

C++
... Okay.

std::string,
std::string_view,
char*,
std::wstring,
hstring,
qstring...
How about now? ( ͡° ͜ʖ ͡°)

the irony appears to be that JavaScript is more consistent than rust

so let's say you want to create some enums to represent some potential values in a REST JSON payload

well you can implement Display trait but that won't determine the JSON output
you can make a as_str() method and that doesn't even make sense frankly, I guess it's not even a trait even though it's everywhere in the std library? (traits being rust's version of interfaces, so you'd think they should be consistent)

I have a halfway urge to say rust was a beloved language but then the foundations' drama made everyone escape the ship, leaving behind a mess

well evidently the answer is you use the stupid annotations:
enum Lang {
#[serde(rename = "en-US")]
EnUS,
}
well then this only works in serialization with serde. way to go.

how about if I have some JSON data that starts with numbers? I have an interval field in the REST that expects things like 1m, 15m denoting time scale
well no deal
because rust doesn't want enums starting with numbers

and here I thought rust was superior with its static typing. but I am having to rename things all the way down and nothing is consistent. this would be so trivial in JavaScript. and there's only one toString() method! and no interfaces people say you should use while nobody uses them!

"Reflective" programming...

In almost every other language:
1. obj.GetType().GetProperties()
or
for k, v in pairs(obj) do something end
or
fieldnames(typeof(obj))
or
Object.entries(obj)

2. Enjoy.

In C++: 💀
1. Use the extern keyword to trick compilers into believing some fake objects of your chosen type actually exist.

2. Use the famous C++ type loophole or structured binding to extract fields from your fake objects.

3. Figure out a way to suppress those annoying compiler warnings that were generated because of your how much of a bad practice your code is.

4. Extract type and field names from strings generated by compiler magic (__PRETTY_FUNCTION__, __FUNCSIG__) or from the extremely new feature std::source_location (people hate you because their Windows XP compilers can't handle your code)

5. Realize your code still does not work for classes that have private or protected fields.

6. Decide it's time to become a language lawyer and make OOPers angry by breaking encapsulation and stealing private fields from their classes using explicit template instantiation

7. Realize your code will never work outside of MSVC, GCC or CLANG and will always be reliant on undefined behaviors.

8. Live forever in doubt and fear that new changes to the compiler magic you abused will one day break your code.

9. SUFFER IN HELL as you start getting 5000 lines worth of template errors after switching to a new compiler.

Its only 5 months left till my graduation,and my mind is getting fucked up.

The current startup i am interning with is a lot stressful and demanding. I am giving my 1000%, only because this is the only place to.. how can i explain..
if world is a race of horses, then i am the tortoise and these guys are the only slow horses that i think i can catch up with. These people are your next door app dev startup, releasing multiple apps fastly and trying to hit the magic recipe. I am not sure if i am learning anything besides how to search stuff on my own and produce faster results. But still, better than nothing.

However i am a far sighted person and am not sure if this is the future that i want.

I am currently giving 14+ hours to this startup as an intern (including all the traveling from home). The only relaxation i could make in future is to shift near the office which will save me 3-4 hours but then what?

I am currently running out of goals. My childhood was shit, but i want to make my youth meaningful.

Leaving my home means leaving the only 2 people (mom/dad) currently present actively in my life.

My college would be over by then, all my colleagues are all on their own ,going into different companies. We don't meet now leave alone meeting then. I am also not much into( or have the time to be into) online games and anime where those guys meet/chat
Not that i was able to gather courage to get into some relationship or talk to people till now. I don't have much talks with my officemate or gals coz 1 :i am so full of work and (2) i simply can't

Currently i spent my whole Saturday sleeping and watching movies and Sunday doing the office work.

Is this going to be my whole working life now? I often think other people's jobs as less demanding but i don't think that would be the case.

I just want to be in touch with people, the people that i know, the people i can trust somewhat.

When i was in 7th std, life was so easy. There was this just 1 irritating thing called school that we had to attend.
After that, we used to run down to nearest park in our shorts and cricketbats or rsckets, play till our heart's content, then sit in some friends house for hours and talk shit , then come back home , do some irritating study, then go back to watching television and playing online games with those same friends , while deciding the birthday party of some guy and game plans for the next day.

Damn

I'm shitting there hammering out some code butchering some real problems when I suddenly realise I'm surrounded. I look around and yes it's the bloody committee.

The committee is what I call the rest of the department and it is dominated by the old guard which comprises of the programmers that have been around for longer.

None of the old guard can program particularly well but because they had been around the longest they'd all grown senior. The committee had free reign but anyone else doing anything differently has to get approval from the committee.

The only way to code otherwise was to copy and paste existing code then to primarily rename things. If anyone did anything that hadn't been seen before then it would have to be approved by the committee. Individual action was not permitted unless you were old guard.

I swept my headphones away expecting it to be something unimportant. It was.

First things first they announce. We're going to add extraneous commas to the last element of all possible lists separated by comma including parameters or so they say. Ask but why so I do.

Because the language now supports it. They added support for it so it must be the right way someone proclaimed. Does it? I didn't realise we were waiting for it. Why do we want it though?

Didn't you hear? It's all over the blogosphere. It massively improves merge requests. But how I ask?

Five minutes later I grow tired of the chin stroking, elbow harnessing, slanted gazes into the yonder and occasionally hearing maybe its because and ask if they mean when you for example add an element the last element registers as changed from adding a comma. Turns out that's all it is.

How often do we see that tiny distraction and isn't it pointless to make the code ugly just for a tiny transient reduction in diff noise I ask. Everyone's stumped. This went on and on and got worse and worse. But it makes moving things around easy half of them say in unison like the bunch of slobs that they are. I mean really. It doesn't make expanding and contracting statements from multiline to single line easy and it's such a stupid thing. Is that all they do all day? Move multi-line method parameters up and down all day? If their coding conventions weren't totally whack they wouldn't have so many multiline method prototypes with stupid amounts of parameters with stupidly long types and names. They all use the same smart IDE which can also surely handle fixing the last comma and why is that even a concern given all the other outrageously verbose and excessive conventions for readability?

But you know what, who cares, fine, whatever. Lets put commas all over the shop and then we can all go to the pub and woo the ladies with how cool and trendy we are up to date with all the latest trends and fashions then we go home with ten babes hanging off each arm and get so laid we have to take a sick day the following to go to the STD clinic. Make way for we are conformists.

But then someone had to do it. They had to bring up PSR. Yes, another braindead committee that produces stupid decisions. Should brackets be same line or next line, I know, lets do both they decided. Now we have to do PSR and aren't allowed to use sensible conventions.

But why, I ask after explaining it's actually quite useful as a set of documents we can plagiarise as a starting point but then modify but no, we have to do exactly what PSR says. We're all too stupid apparently you see. Apparently we're not on their level. We're mere mortals. The reason or so I'm told, is so that anyone can come in and is they know PSR coding styles be able to read and write the code. That's not how it works. If you can't adjust to a different style, a more consistent style, that's not massively bizarre or atypical but rather with only minor differences from standard styles, you're useless. That's not even an argument, it's a confession that you've got a lump of coal where your brain's supposed to be.

Through all of this I don't really care because I long ago just made my own code generators or transpilers that work two ways and switch things between my shit and their shit but share my wisdom anyway because I'm a greedy scumbag like that.

Where the shit really hit the fan is that I pointed out that PSR style guide doesn't answer all questions nor covers all cases so what do we do then. If it's not in PSR? Then we're fucked.

I knew my week was over last Friday when I added a std::cout to debug some behavior and it would not compile anymore. Go c++ 😎🤘

Best way to deal with office politics?

As background: we have our own implementation of some C++ data structures, including an "Array" class (basically the same as std::vector).

A few years ago, the senior guys on my team refused to add new features to it for (seemingly) no good reason.

So senior guys from another team added the features anyways, in THEIR repo.

My team couldn't stop them, but refused to allow the new features in OUR repo, so now our Array is split between two repos for no good reason 😢.

Two years later, here I am, hoping to clean this up. As far as anyone knows, there's no good reason to have it split up like this.

How do i convince my team that we should move the code to OUR repo where it belongs?

What's that? You committed the tmp/dist/cache field for something only YOU run locally and asked me to review it. Just GET OUT.

std::chrono is::a::fucking::pile::of::dog::shit. What a fucking disgrace. Hated it in boost, now this shit is in std. Each time I use it, I have to use google. Google should become part of std chrono in c++, without it you cannot write chrono code.

To make time_point member in your own class you have to do this: std::chrono::high_resolution_clock::time_point t; ... WTF

Machine learning, I dream of a machine saving a lot of time 🙃

Started porting one application written in php to:
Golang(and some libraries to make certain sht simpler like GORM and Gorilla amongst a couple of others, most shit is STD shit already built in)

Java Spring(I know it well, but wanted to try this particular app in it, lots of boilerplate although the coded is solid AF)

.NET Core API, which I separated in a series of modules for the domain interface, the persistence logic, the actual api etc, I really dig it. It has a basic React frontend in Typescript whereas the other 2 versions are using the standard Go html/template package and the Twig interface for Spring.

My favorite thus far is Golang. I find it extremely easy to extend, the language reads good enough for a retard like myself to make sense of it fairly easy, really easy to test and experiment with it, any idea I get for something to add(say users and stuff) took me less than 30 mins to figure out while reading the actual documentation, as in the base documentation or just the source code.

I know the language is retard proof, and I am highly enjoying this. Not to say that the other two are bad, not at all, been using C# and Java for years now, but I highly appreciate being able to concentrate on functionality rather than all the fucking architectural boilerplate needed to run basic shit in the other two frameworks. Thus far Golang has been a breath of fresh air the likes Clojure gives me, while not even being a profound or mind blowing language in terms of features(since other than the interface{} and goroutines i can't think of shit) and have not reached a scenario in which I am stuck or dying to have generics one bit for the overall business logic.

The app is growing like crazy in terms of code since the original php application was huge to begin with, but dear me this shit is as simple as it can get without being too technical. Might move it to production once all usability tests pass and force the rest of the staff to learn it. I have one lead dev that damn near refuses to touch anything other than php, and a very eager to try shit out content administrator that comes from a Java and C# background.

all I want to say is how much I love go haha

Getting hard time to understand std::vector and even more confusing with multidimensional vector.
Going back to array. 😪

Does anyone knows why in c++ floats range from numeric_limits<float>::lowest() to ::max() and ::min() is just the lowest positive value instead the actual minimum? This strange naming convention just costs me an hour of my life that I'm never getting back...

!rant

Ever find something that's just faster than something else, but when you try to break it down and analyze it, you can't find out why?

PyPy.
I decided I'd test it with a typical discord bot-style workload (decoding a JSON theoretically from an API, checking if it contains stuff, format and then returning it). It was... 1.73x the speed of python.

(Though, granted, this code is more network dependent than anything else.)

Mean +- std dev: [kitsu-python] 62.4 us +- 2.7 us -> [kitsu-pypy] 36.1 us +- 9.2 us: 1.73x faster (-42%)

Me: Whoa, how?!
So, I proceed to write microbenches for every step. Except the JSON decoding, (1.7x faster was at least twice as slow (in one case, one hundred times slower) when tested individually.
The combination of them was faster. Huh.

By this point, I was all "sign me up!", but... asyncpg (the only sane PostgreSQL driver for python IMO, using prepared statements by default and such) has some of it's functionality written in C, for performance reasons. Not Cython, actual C that links to CPython. That means no PyPy support.

Okay then.

hello, today I fell in love with pointers

std::cout << *greetingMessage;

CUDA is a fucking bitch when it comes to configure projects

Creating my first CUDA project it yelled at me it doesn't support my current gcc version, ended up with me yelling back "OY SHUTUP" and slapping some flag for it to use clang instead — basically what it advised but I didn't listen first. Fine now.

Working on this project on another fresh environment, and now it doesn't detect anything and dumbly tries to reload my CMake project with the LATEST installed gcc when I already told it to use version 8 TWICE. First by setting up a toolchain with compilers pointing to this specific version and second by passing the -DMAKE_C_COMPILER pointing to it again. Still this stubborn piece of shit tries with latest everytime.

The most applauded solution was to use update-alternatives to make gcc point to the version I want CUDA to use. Thank you genius, but what if I don't want to use a deprecated gcc version with normal Cxx projects ?

And cherry on the top of this bullshit, I'm fixing this dumb configuration issue (can't stress enough how much I hate this shit) to be able to fix an EVEN MORE annoying issue with CUDA being a bitch AGAIN and not letting me use std functions where I'm allowed to

Fuck CUDA. Fuck CMake. Fuck C. Fuck everything

Bad coding style:

bool condition = false;

if(condition) { /* enough whitespace so that braces appear offscreen in editor*/ }{
std::cout << "hahahahaha" << std::endl;
}

if anyhow is so good and important why isn't it part of the std

I just can't with this

I don't wanna download a bunch of unnecessary libraries just because people were lazy

intuitive feature positioning

I spent the last 1.5 hours trying to optimize delivery of two 8.0KB JS files. It didn't work, at all tried like everything I could find. At the end I initialized it in angular json and made it load regardless. Made me realize that it is not made for optimization.

How do you know ML and AI has gone too far? You rely on the algorithm instead of the obvious.

Google will translate comments, etc. At times when you click on an English video to language around your location. This is so obvious, if I didn't understand English if would not have clicked on the video!!
#BringBackThePreMLdevs

Currently trying to make newer C++11 code run on a gcc 4.8 compiler. Also making Qt 5 code run on Qt 4.8. Enabling experimental flags on gcc like std=c++1y and turning on flags to turn off complaints about pre c++11 code. Have my cake and eat it too. My favorite so far it to create a proxy object so I can connect lambdas to Qt signals. This is supported in Qt 5, but not Qt 4. I feel like I am traveling back in time to when stuff was shittier standards wise.

Have you ever written a very complicated code to look like a professional programmer??

For example:hello world app in c++

#include <iostream>
using namespace std;

int main(int argv, char argc)
{
char vhWnd[] = new char[13];

struct dataentry
{
string txt;
float vex = 0.2345234;
};

vhWnd[1] = 'e';
vhWnd[4] = 'o';
vhWnd[3] = 'l';
vhWnd[2] = 'l';
vhWnd[7] = 'o';
vhWnd[5] = ' ';
vhWnd[6] = 'W';
vhWnd[9] = 'l';
vhWnd[8] = 'r';
vhWnd[13] = '\0';
vhWnd[10] = 'd';
vhWnd[12] = '!';
vhWnd[11] = ' ';
vhWnd[0] = 'H';

for ( int i = 0, i=13, i++)
{
nhttp << vhWnd[i];
}

return 85037593;
}

Ever used std::shared_ptr in a Qt-Project? Just Don't!

how to print something on screen without using any library (iostream,stdlib,bit/std++) in c/c++

so anyhow is a rust crate used in like 1/3 of all repositories

but you could just not add a dependency and do Result<(), Box<dyn std::error::Error>>

🤔

probably I'm missing something

I'm probably not the first, but ...

template <typename T>
using $ = std::shared_ptr<T>;

I mean... C'mon!

So today I tried to code in c++ by separating class code into header and cpp file which I had not done before. Compiler was throwing error while compiling, "undefined reference to std::cout". Took me nearly an hour to figure out I was using gcc instead of g++.

I don't "using namespace std;" because it makes my code look more confusing to others and may make them more hesitant to ask questions.

Why the pointer of member function so special.

trying make a non-template class that like std::function but simpler:
1. wrap static function pointer.
2. wrap class member function pointer and the class object pointer.
3. WITHOUT ALLOCATE MEMORY.

I can't store member function pointer because the size is undefined?!

C++ is the building blocks for many high-level programming languages, and since 1984 its first appearance in the markets the C++ core committee developers have introduced its 4 new versions which are C++03 (ISO/IEC 14882:2003 second edition), C++11 (third edition), C++14 (fourth edition) and C++17 is the fifth edition. With each new version, developers introduced new features, libraries and APIs in it.

C++ introduced as the extension of C programming language which made C++ as a compiled programming language, which means the developer required a C++ compiler to translate the C++ code to its equivalent machine or byte language, so the Operating system of the computer can execute the program.

There are various C++ compilers in the market and most of them are open source and free to use, however conventionally when we say C++ compiler, we basically talk about GCC which stands for GNU Compiler Collection.

What is GCC?

GCC stands for GNU Compiler Collection, and it is a collection of programming compilers which induce C, C++, Objective-C, Fortran, and some versions of Java. The first version of GCC introduced in 1987 and it was also known as GNU C compiler which became the standard compiler for C programming language, in that same year GCC also provided Compiler support for the C++ programming language.

Now GCC has various versions and each version give specific support for C++ versions, by now if we look at all the versions of GCC, we have a stable GCC for every version of C++, but there are some exceptions with C++11.

C++11:

C++11 introduced as the 2nd update version of C++, it suffixes 11 because it released in 2011 or because on August 12, 2011, ISO gives official approval to it. Formally C++11 known as C++0X because developers were expecting the new update released in 2010, but with its release in 2011, the core committee developer of C++ changed its name by C++0X to C++11.

C++ 11 replaced the old version of C++03, and it also brings many new features for the C++ developers. The main aim of designing C++11 to stabilize and maintain the backward compatibility of new C++ version with the C+98 and C programming language and that’s become the main reason why core committee developers only introduced new features in the old standard library rather than extending the core language.

 

GCC does not give Full Support to C++11:

GCC version GCC 4.8.1 purpose the first feature-complete implementation of the C++11 standard, however, the 4.8 and 4.7 does not give the full support for the C++11. The current version of GCC provides the major support for all the standard features of C++11 but if you are using the GCC 4.8 or 4.7 versions then your GCC only provide you with the experimental support for the C++11.

To use the Experimental support of GCC you need to enable it first before you compile or run you C++ 11 version code.

use code std=c++11 or -std=gnu++11 to enable the experimental support for C++11.

I have a question regarding file redirects 2>&1 and 1>&2. I know that file descriptor 1 is std o/p and 2 is std error and that we're redirecting one file descriptor to another.

But why do we do it? What are their use cases? Wouldn't the file to which redirection is setup get too clunky?
Analysis of the file would also become a bit difficult. And wouldn't having errors stored in a separate file make it easier to interpret and fix them?

Degree is still on the way.
But once i have finished it'll help me do something like

std::cin>>a;
syd::cin>>b;
int sum = a + b ;
std::cout<<"sum of both numbers is:"<<sum;

My degree tells me that it is the most useful way of solving real world problems. By using c++ to cout statemens on terminal can solve all problems of a corporate company.

The crazy shenanigans you can do with C++ standard libs are fascinating.
Like implementig multithreading with just a foreach, and bindings which can make member function pointers to simple function pointers, and placeholders in bindings. Also lambda functions are cool.
Something between the lines:
my_crazy_class *tmp = new my_crazy_class(...);
std::vector<type> my_array = .....;
std::for_each(std::execution::par,my_array.begin(),my_array.end(),
[&](type in){
auto fn = std::bind( &my_crazy_class::my_crazy_fnc,*tmp,_1,random_static_value);
return fn(in);
});
ps:
It's pretty much pseudocode, and please don't do things like this, it's bad for your mental health.
pps:
I need to learn how to use this tools wisely.

while(1) ;
Std::cin.get()

I am tired of these when learning cpp. Unnecesary rant!

Allright, to settle a debate what is the more incorrect way of getting the last elememt of a std::vector?

Is it this:
auto i = myVec.at(myVec.begin() + myVec.size() - 1);

or:
auto i = *(&myVec.at(0) + (myVec.size() - 1));

I think the second method is better(worse) because it has more brackets and only works on Implementations where the vector's data is laid out concurrently (that is in the c++11 spec, but I've seen some shit)

My friend argues for the first method because it takes more time. (If IO is not a bottleneck)

Long term problem has been
What language and toolset to write desktop apps in if not win forms and c# because sure as. Fuck wont be wpf or std win32 with c

how can i learn to drive without killing myself?
i have several constraints around me, some seems solvable but others seems kinda messed up:

1. no vehicle?? my family owns just one scooter with a 125cc engine that my father takes for his job.
solution : i can buy another vehicle , i got finances.

2. problem of keeping? : living in the world's 2nd most populous country, we had to fight worse battles with our neighbours to get the parking of 1 small 2 wheeler. we might get another one somewhere for another 2 wheeler, but anything bigger than that, and I don't know if it could fit.
solution : ???

3. what to buy? cars are usually most preferable since they are made for multiple people travel. but bike riding is a good skill and bikes can cut through traffic pretty easily. light scooters are also very good as they are easy to balance and cheap, but some highways don't allow them as they can't reach the std 80-90 kmph speed limits
solution??

4. my history of shitty driving and how to get better? we have this scooter in our family for last 4 years (and a few before those that my father used , but this was the firs vehicle that i bought ) , but i haven't been able to get better at it. i can surely ride it myself and drive it at slow speeds without someone sitting on the backseat, but if there is someone at the back, then my hand shakes and the backseat person will be shit scared. i also failed my driving license test, and it will he awkward to buy a new vehicle of I can't properly learn it /use it on daily basis
solution : ???

5. why buy? i never really had a use for it. my college was 90kms away from my home and required train+bus+auto travelling for 2 hours on highways.
and now my work is from home. i sometimes think that my lack of necessity has also caused me not to learn this skill properly
solution : ??

i really wanna learn this skill and be seen as a more maturw reliable person but everything around it seems confusing.

After several Firefox/Mozilla failures (getting rid of proper addons, supporting censorship) Waterfox looks like a promising alternative. On Windows it runs great, sadly on Kubuntu LTS it does not - binary package only works with quite new std c++ library :-(. Damn it, why can't they distribute all their libraries together like Tor browser does (it's also Firefox based)?

With C++11, fell in love with std::enable_if and others in type_traits.

Lets you take generic programming to a whole new level. I never used it when this was part of boost thinking it didn't make as much sense. Now, I like to qualify my template definitions to be as restrictive as possible based on the expected usage.

Some words just aren't the same anymore. Sometimes i replay in a dumb manner.

#include <iostream>
using namespace std;

int main() {
int t;
cin>>t;
while(t--){
int n;
cin>>n;
int arr[n];
int count=0;
for(int i=0;i<n;i++){
cin>>arr[i];
count^=arr[i];
}
cout<<count<<endl;
}
return 0;
}

In the above program,
how does this code snippet work?
count^=arr[i];

Just realized a member function pointer can be a template parameter as non-type, gonna try to use it do no dynamic memory allocation trick with std::function.

"You shouldn't use STL as it's slower"

<<Writes std::array instead of double* >>

Oh look, the execution time and the instruction read is the same!

std::cout from C++.
Why? Because I use it all the time, can't live without it.
Sometimes the most important pieces of code is the simplest.

I can't tell if I didn't understand an important detail about Rust traits or the system is badly underdesigned, but I keep bumping into situations where the most general correct implementation of an std trait on a container clashes with one of the std implementations, and I would need a very obvious negative statement to make them mutually exclusive (for example that T in MyPtr<T> can never implement Borrow<MyPtr<T>>)

AOA friends please help me to solve the program of C++

#include <iostream>
using namespace std;

int main() {
int passengers = 126;
int empty_seats = 0;
//passengers =126;
passengers after 1st bas leaving= passengers - 50;
passengers after 2nd bas leaving= passengers - 50;
passengers after 3rd bas= passengers;
empty_seats= 50 % passengers;
cout << "Empty seats in last bas"<< empty_seats <<endl;

return 0;
}